[PATCH v5 15/17] crypto/nx: Register and unregister VAS interface on PowerVM

[Haren Myneni <haren@linux.ibm.com>]

The user space uses /dev/crypto/nx-gzip interface to setup VAS
windows, create paste mapping and close windows. This patch adds
changes to create/remove this interface with VAS register/unregister
functions on PowerVM platform.

Signed-off-by: Haren Myneni <haren@linux.ibm.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
---
 drivers/crypto/nx/Kconfig             | 1 +
 drivers/crypto/nx/nx-common-pseries.c | 9 +++++++++
 2 files changed, 10 insertions(+)

diff --git a/drivers/crypto/nx/Kconfig b/drivers/crypto/nx/Kconfig
index 23e3d0160e67..2a35e0e785bd 100644
--- a/drivers/crypto/nx/Kconfig
+++ b/drivers/crypto/nx/Kconfig
@@ -29,6 +29,7 @@ if CRYPTO_DEV_NX_COMPRESS
 config CRYPTO_DEV_NX_COMPRESS_PSERIES
 	tristate "Compression acceleration support on pSeries platform"
 	depends on PPC_PSERIES && IBMVIO
+	depends on PPC_VAS
 	default y
 	help
 	  Support for PowerPC Nest (NX) compression acceleration. This
diff --git a/drivers/crypto/nx/nx-common-pseries.c b/drivers/crypto/nx/nx-common-pseries.c
index cc8dd3072b8b..9a40fca8a9e6 100644
--- a/drivers/crypto/nx/nx-common-pseries.c
+++ b/drivers/crypto/nx/nx-common-pseries.c
@@ -9,6 +9,7 @@
  */
 
 #include <asm/vio.h>
+#include <asm/vas.h>
 
 #include "nx-842.h"
 #include "nx_csbcpb.h" /* struct nx_csbcpb */
@@ -1101,6 +1102,12 @@ static int __init nx842_pseries_init(void)
 		return ret;
 	}
 
+	ret = vas_register_api_pseries(THIS_MODULE, VAS_COP_TYPE_GZIP,
+				       "nx-gzip");
+
+	if (ret)
+		pr_err("NX-GZIP is not supported. Returned=%d\n", ret);
+
 	return 0;
 }
 
@@ -1111,6 +1118,8 @@ static void __exit nx842_pseries_exit(void)
 	struct nx842_devdata *old_devdata;
 	unsigned long flags;
 
+	vas_unregister_api_pseries();
+
 	crypto_unregister_alg(&nx842_pseries_alg);
 
 	spin_lock_irqsave(&devdata_mutex, flags);
-- 
2.18.2